The idea is that the nation ______ an unmanned spacecraft to explore the planet first.

分类: 作业答案 • 2022-02-09 10:47:10

问题描述：

The idea is that the nation ______ an unmanned spacecraft to explore the planet first.
a.sent b.sends c.send d.must send
为什么

答

1. c. 正确
2. 也可用 should send.should 可以省略,省略后正好就是答案 c 了.
3. 属虚拟语气.